Android base flavor without duplicate class error

android, android-productflavors, gradle

Solution

The best solution what I founded is write all classes in app\src\main and add where needed:

if(BuildConfig.FLAVOR.equals("mainapp")) {
  // mainapp code
} else {
  // coomon flavor code
}

Problem

I have few versions of my app: common version, say `mainapp` and few builds specific per customer, say `custom1`, `custom2`, `custom3`. And I want to have base flavor for all customX flavors. I was trying to do like this: Create project structure: ``` app\src\main app\src\mainapp app\src\commonflavor app\src\custom3 ``` And config: ``` productFlavors { mainapp { } custom1 { } custom2 { } custom3 { } } sourceSets { custom1 { java.srcDirs = ['src/commonflavor/java'] } custom2 { java.srcDirs = ['src/commonflavor/java'] } custom3 { java.srcDirs = ['src/commonflavor/java', 'src/custom3/java'] } } ``` In `commonflavor` I put common java classes for all customX flavors, say `MainActivity.java` and `SecondActivity.java`. But in `custom3` I need separate `SecondActivity.java`. In this case I have an error `error: duplicate class: SecondActivity` from `src/commonflavor/java` and `src/custom3/java`. For now I have resolved this using class dupllication: ``` sourceSets { custom1 { java.srcDirs = ['src/commonflavor/java'] } custom2 { java.srcDirs = ['src/commonflavor/java'] } custom3 { java.srcDirs = ['src/custom3/java'] } } ``` I have copied `src/commonflavor/java` from srcDirs and copy `MainActivity.java` to `custom3`. The problem is that I have 2 clone of `MainActivity.java` file in `src/commonflavor/java` and `src/custom3/java` How to resolve this situation without code duplication?

Original source